No, it didn't die and it won't die anytime soon. But dollars, Euro's and all other physical currencies are about to die(soon). Why? Because just like the change from gold and silver coins to almost worthless nickel, this type of currency creates a whole new universe of possibilities.
With nickel and paper money, banks can create as much cash as they like, it's virtual value, not real. Crypto currency is just like that, but more secure and not (yet) controlled by the banks. And again you see the allegations that crypto would be a pyramid scheme etc.. Do people notice that our actual economy/financial-system is a very proven pyramid scheme? All money flows to the rich. And especially those people in power now, are getting a little nervous seeing they might lose some control.
Crypto currencies can be a boon for humanity, unless governments are going to criminalize it and only allow banks to use the technology.